CN110632119A - Test device and test method for measuring adhesion between soil body and metal interface under influence of temperature rise of soil body - Google Patents
Test device and test method for measuring adhesion between soil body and metal interface under influence of temperature rise of soil body Download PDFInfo
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- 239000002689 soil Substances 0.000 title claims abstract description 104
- 238000012360 testing method Methods 0.000 title claims abstract description 35
- 239000002184 metal Substances 0.000 title claims abstract description 25
- 238000010998 test method Methods 0.000 title claims abstract description 11
- 230000036760 body temperature Effects 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000009529 body temperature measurement Methods 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000013508 migration Methods 0.000 claims description 3
- 230000005012 migration Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000004927 clay Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005370 electroosmosis Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
- G01N25/58—Investigating or analyzing materials by the use of thermal means by investigating moisture content by measuring changes of properties of the material due to heat, cold or expansion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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Abstract
The invention provides a test device and a test method for measuring adhesion between a soil body and a metal interface under the influence of simulated soil body temperature rise.
Description
Technical Field
The invention belongs to the technical field of tunnel and underground engineering test instruments, and particularly relates to a test device and a test method for testing adhesion between a soil body and a metal interface under the influence of temperature rise of the soil body.
Background
Nowadays, shield construction is fully applied to urban rail construction by virtue of the advantages of high efficiency and safety, but the problem that a cutter head is bonded with mud cakes often brings adverse effects to shield construction. When the shield tunneling machine tunnels in the stratums such as silt clay and silty clay, soil cut by the cutter head is easy to adhere to the surface of the cutter head to form mud cakes, the mud cakes are formed by the serious cutter head, and even the surface of the cutter head is full of mud cakes, so that the problems of increase of torque of the cutter head, reduction of tunneling efficiency and the like are caused. Therefore, the research is carried out on the adhesion condition between the soil body and the cutter head. Therefore, an effective method is explored to eliminate the harm of mud cakes, and the method has very important engineering value.
At present, many researches on the adhesion condition between soil and metal interfaces are carried out. For example, in the study on the adsorption force of a clay foundation on a structure, Wang hong Min applies normal tension to a test plate arranged in soil to observe the adhesion condition between a soil body and a metal interface; hou Lei is in bionic micro-electroosmosis viscosity-reducing desorption exploration, an electroosmosis drawing test is carried out on a measuring disc in soil by using a Meitess electronic universal testing machine, and the adhesion condition between a soil body and a metal interface is observed. The existing test device and technical means are often used for directly drawing the measuring disc to observe the change condition of the adhesion force, the temperature rise of the soil body caused by the change of the external environment cannot be simulated, and the influence of the temperature rise of the soil body caused by the change of the external environment on the adhesion condition of the soil body and the cutter disc interface cannot be measured.
In order to overcome the defects, the invention provides a test device and a test method for testing the adhesion force between a soil body and a metal interface under the influence of simulated soil body temperature rise.
Disclosure of Invention
The invention provides a test device and a test method for testing the adhesion force between a soil body and a metal interface under the influence of simulated soil body temperature rise, and aims to solve the problems that the current test method cannot simulate the soil body temperature rise caused by external environment change and cannot test the influence of the soil body temperature rise caused by the external environment change on the adhesion condition of the soil body and a cutter head interface.
A test device for testing adhesion between a soil body and a metal interface under the influence of temperature rise of the soil body is simulated, and is characterized by comprising a box body 1, a box cover 2, a pressing plate 3, a pull ring 4, an annular rubber pad 5, a heating plate 6, a temperature sensor 7 and a bolt 8;
the box body 1 is made of heat insulating materials, the shape and the inner space are T-shaped, the lower rectangular space is used for storing a test soil body, the upper rectangular pipeline contains the pressing plate 3, and the pressing plate 3 can move up and down in the upper rectangular pipeline of the box body 1; the inner wall of the upper rectangular pipeline is provided with an annular rubber pad 5 to prevent soil and water from being brought out when the pressing plate 3 is pulled up;
the top of the pressing plate 3 is uniformly provided with 3 pull rings 4 which can be connected with a drawing force measuring device, the bottom of the pressing plate 3 is provided with a wedge-shaped head, and a high-strength mud cake is formed on the surface of the wedge-shaped head of the pressing plate 3 when the soil body is heated;
the box cover 2 is arranged at the lower part of the box body 1, is fixed or separated from the box body 1 through bolts 8 at the left side and the right side, the box cover 2 is removed when soil is filled into the box body 1, and the box cover 2 is fixed on the box body 1 after the soil is filled.
The box body 1 is provided with 3 layers of grooves on the inner walls of the left side and the right side of the lower rectangular space, and heating plates (6) are arranged in the grooves to heat soil bodies with different depths, so that the refined temperature control of the soil bodies can be realized; the heating plate 6 consists of a metal plate and heating resistance wires, the heating resistance wires are arranged on the surface of one side, in contact with the box body 1, of the metal plate and are arranged in an S shape, and the test soil body is heated through the heating plate 6;
6 temperature sensors 7 are arranged on the inner wall of the upper side of the lower rectangular space of the box body 1 and are positioned on the left side and the right side of the upper rectangular pipeline; 7 temperature sensors 7 are uniformly arranged on the inner wall of the box cover 2; the temperature sensor 7 is connected with an external data acquisition device.
Furthermore, a specific distribution temperature field is determined to be formed in the soil body through the heating rate control of the heating plate 6 and the feedback of the temperature sensor 7 to the temperature measurement of different positions, so that differential water migration distribution is formed in the soil, water films with different thicknesses are formed on the surface of the cone, and specific water content distribution is formed in the soil around the cone.
A test method for simulating the determination of the adhesion force between a soil body and a metal interface under the influence of soil body temperature rise is adopted for testing by the test device for simulating the determination of the adhesion force between the soil body and the metal interface under the influence of soil body temperature rise, and the specific steps are as follows:
step 1: the device is fixed on a platform 9 in an inverted mode, and a supporting block 10 is arranged at the top of a pressing plate 3 for supporting, so that a wedge-shaped head at the lower part of the pressing plate 3 is just inserted into a rectangular space at the lower part of a box body 1;
step 2: filling soil into the box body 1, leveling the surface after compaction in layers, covering the box cover 2 on the box body 1, and fixing through bolts 8;
and step 3: the device is arranged upright and is connected with a drawing force measuring device through a pull ring 4, a heating plate 6 is connected with an external power supply to heat the soil body, and a temperature sensor 7 is connected with an external data acquisition device;
and 4, step 4: the temperature sensor 7 is used for observing the temperature change of the soil body, when the temperature of the soil body reaches t ℃, the normal tension is applied to the pressing plate 3 through the drawing force measuring device, the drawing force F when the pressing plate 3 is just drawn out of the soil body is recorded, and the adhesion value between the soil body and the pressing plate interface is the weight obtained by subtracting the drawing force F from the pressing plate 3.
Advantageous effects
The invention provides a test device and a test method for measuring the adhesion force between a soil body and a metal interface under the influence of temperature rise of the soil body, wherein the test device comprises a box body 1, a box cover 2, a pressure plate 3, a pull ring 4, an annular rubber pad 5, a heating plate 6, a temperature sensor 7 and a bolt 8; the heating plate 6 arranged in the soil box heats the tested soil body, and a high-strength mud cake is formed on the surface of the wedge-shaped head of the pressing plate 3 after the soil body is heated, so that the aim of changing the external environment to cause the temperature rise of the soil body is fulfilled, and the problems that the temperature rise of the soil body caused by the change of the external environment cannot be simulated by the conventional test means, and the influence of the temperature rise of the soil body caused by the change of the external environment on the adhesion condition of the soil body and the cutter head interface cannot be measured are effectively.
Drawings
FIG. 1 is a cross-sectional view of the structure of the apparatus according to the present invention;
FIG. 2 is a top view of a device according to the present invention;
FIG. 3 is a schematic view of a heating plate structure;
FIG. 4 is a schematic view of the apparatus in inverted soil loading;
FIG. 5 is a schematic drawing of the platen;
description of reference numerals: the box body 1, the box cover 2, the pressing plate 3, the pull ring 4, the annular rubber pad 5, the heating plate 6, the temperature sensor 7, the bolt 8, the platform 9 and the supporting block 10.
Detailed Description
The invention will be further described with reference to the following figures and examples.
As shown in fig. 1-5, a test device for simulating measurement of adhesion between a soil body and a metal interface under the influence of soil body temperature rise is characterized by comprising a box body 1, a box cover 2, a pressing plate 3, a pull ring 4, an annular rubber pad 5, a heating plate 6, a temperature sensor 7 and a bolt 8;
the box body 1 is made of heat insulating materials, the shape and the inner space are T-shaped, the lower rectangular space is used for storing a test soil body, the upper rectangular pipeline contains the pressing plate 3, and the pressing plate 3 can move up and down in the upper rectangular pipeline of the box body 1; the inner wall of the upper rectangular pipeline is provided with an annular rubber pad 5 to prevent soil and water from being brought out when the pressing plate 3 is pulled up;
the top of the pressing plate 3 is uniformly provided with 3 pull rings 4 which can be connected with a drawing force measuring device, the bottom of the pressing plate 3 is provided with a wedge-shaped head, and a high-strength mud cake is formed on the surface of the wedge-shaped head of the pressing plate 3 when the soil body is heated;
the box cover 2 is arranged at the lower part of the box body 1, is fixed or separated from the box body 1 through bolts 8 at the left side and the right side, the box cover 2 is removed when soil is filled into the box body 1, and the box cover 2 is fixed on the box body 1 after the soil is filled.
The box body 1 is provided with 3 layers of grooves on the inner walls of the left side and the right side of the lower rectangular space, and heating plates (6) are arranged in the grooves to heat soil bodies with different depths, so that the refined temperature control of the soil bodies can be realized; the heating plate 6 consists of a metal plate and heating resistance wires, the heating resistance wires are arranged on the surface of one side, in contact with the box body 1, of the metal plate and are arranged in an S shape, and the test soil body is heated through the heating plate 6;
6 temperature sensors 7 are arranged on the inner wall of the upper side of the lower rectangular space of the box body 1 and are positioned on the left side and the right side of the upper rectangular pipeline; 7 temperature sensors 7 are uniformly arranged on the inner wall of the box cover 2; the temperature sensor 7 is connected with an external data acquisition device.
Furthermore, a specific distribution temperature field is determined to be formed in the soil body through the heating rate control of the heating plate 6 and the feedback of the temperature sensor 7 to the temperature measurement of different positions, so that differential water migration distribution is formed in the soil, water films with different thicknesses are formed on the surface of the cone, and specific water content distribution is formed in the soil around the cone.
A test method for simulating the determination of the adhesion force between a soil body and a metal interface under the influence of soil body temperature rise is adopted for testing by the test device for simulating the determination of the adhesion force between the soil body and the metal interface under the influence of soil body temperature rise, and the specific steps are as follows:
step 1: the device is fixed on a platform 9 in an inverted mode, and a supporting block 10 is arranged at the top of a pressing plate 3 for supporting, so that a wedge-shaped head at the lower part of the pressing plate 3 is just inserted into a rectangular space at the lower part of a box body 1;
step 2: filling soil into the box body 1, leveling the surface after compaction in layers, covering the box cover 2 on the box body 1, and fixing through bolts 8;
and step 3: the device is arranged upright and is connected with a drawing force measuring device through a pull ring 4, a heating plate 6 is connected with an external power supply to heat the soil body, and a temperature sensor 7 is connected with an external data acquisition device;
and 4, step 4: the temperature sensor 7 is used for observing the temperature change of the soil body, when the temperature of the soil body reaches t ℃, the normal tension is applied to the pressing plate 3 through the drawing force measuring device, the drawing force F when the pressing plate 3 is just drawn out of the soil body is recorded, and the adhesion value between the soil body and the pressing plate interface is the weight obtained by subtracting the drawing force F from the pressing plate 3.
The invention has been explained by applying specific embodiments, and the above description of the embodiments is only used to help understanding the method and core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the invention.
Claims (3)
1. A test device for testing adhesion between a soil body and a metal interface under the influence of temperature rise of the soil body is simulated, and is characterized by comprising a box body (1), a box cover (2), a pressing plate (3), a pull ring (4), an annular rubber pad (5), a heating plate (6), a temperature sensor (7) and a bolt (8);
the box body (1) is made of heat insulating materials, the shape and the inner space of the box body are T-shaped, the lower rectangular space is used for storing a test soil body, the upper rectangular pipeline contains the pressing plate (3), and the pressing plate (3) can move up and down in the upper rectangular pipeline of the box body (1); an annular rubber pad (5) is arranged on the inner wall of the upper rectangular pipeline to prevent soil and water from being brought out when the pressing plate (3) is pulled upwards;
the top of the pressing plate (3) is uniformly provided with 3 pull rings (4) which can be connected with a drawing force measuring device, the bottom of the pressing plate (3) is provided with a wedge-shaped head, and a high-strength mud cake is formed on the surface of the wedge-shaped head of the pressing plate (3) when the temperature of the soil body is raised;
the box cover (2) is arranged at the lower part of the box body (1), is fixed or separated from the box body (1) through bolts (8) at the left side and the right side, is removed when soil is filled into the box body (1), and is fixed on the box body (1) after the soil is filled;
the box body (1) is provided with 3 layers of grooves on the inner walls of the left side and the right side of the lower rectangular space, and heating plates (6) are arranged in the grooves to heat soil bodies at different depths, so that the refined temperature control of the soil bodies can be realized; the heating plate (6) consists of a metal plate and heating resistance wires, the heating resistance wires are arranged on the surface of one side, in contact with the box body (1), of the metal plate and are arranged in an S shape, and the test soil body is heated through the heating plate (6);
6 temperature sensors (7) are arranged on the inner wall of the upper side of the lower rectangular space of the box body (1) and are positioned on the left side and the right side of the upper rectangular pipeline; 7 temperature sensors (7) are uniformly arranged on the inner wall of the box cover (2); and the temperature sensor (7) is connected with an external data acquisition device.
2. The device according to claim 1, characterized in that the formation of specific distribution temperature field in the soil body is determined by the heating rate control of the heating plate (6) and the feedback of temperature measurement of the temperature sensor (7) to different positions, so that differential water migration distribution is formed in the soil, water films of different thickness are formed on the surface of the cone, and specific water content distribution is formed in the soil around the cone.
3. A test method for simulating measurement of adhesion between a soil body and a metal interface under the influence of soil body temperature rise is characterized in that the test device for simulating measurement of adhesion between a soil body and a metal interface under the influence of soil body temperature rise according to any one of claims 1-2 is adopted for testing, and the specific steps are as follows:
step 1: the device is fixed on a platform (9) in an inverted mode, and a supporting block (10) is arranged at the top of a pressing plate (3) for supporting, so that a wedge-shaped head at the lower part of the pressing plate (3) is just inserted into a rectangular space at the lower part of a box body (1);
step 2: filling soil into the box body (1), leveling the surface after compaction by layering, covering the box cover (2) on the box body (1), and fixing through bolts (8);
and step 3: the device is arranged upright and is connected with a drawing force measuring device through a pull ring (4), a heating plate (6) is connected with an external power supply to heat the soil body, and a temperature sensor (7) is connected with an external data acquisition device;
and 4, step 4: and observing the temperature change of the soil body through a temperature sensor (7), applying normal tension to the pressing plate (3) through the drawing force measuring device when the temperature of the soil body reaches t ℃, recording the drawing force F when the pressing plate (3) is just drawn out of the soil body, wherein the adhesion value between the soil body and the pressing plate interface is the weight obtained by subtracting the pressing plate (3) from the drawing force F.
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Cited By (3)
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CN113758865A (en) * | 2021-09-08 | 2021-12-07 | 江苏徐工工程机械研究院有限公司 | Soil adhesion testing device and testing method |
CN114397337A (en) * | 2022-01-29 | 2022-04-26 | 江苏徐工工程机械研究院有限公司 | Soil adhesion force testing device and method |
CN114577512A (en) * | 2022-02-27 | 2022-06-03 | 南京林业大学 | Sampling device and sampling method for measuring initial viscosity-reducing water content of cutter head interface |
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Cited By (5)
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CN113758865A (en) * | 2021-09-08 | 2021-12-07 | 江苏徐工工程机械研究院有限公司 | Soil adhesion testing device and testing method |
CN114397337A (en) * | 2022-01-29 | 2022-04-26 | 江苏徐工工程机械研究院有限公司 | Soil adhesion force testing device and method |
CN114397337B (en) * | 2022-01-29 | 2023-11-07 | 江苏徐工工程机械研究院有限公司 | Soil adhesion testing device and method |
CN114577512A (en) * | 2022-02-27 | 2022-06-03 | 南京林业大学 | Sampling device and sampling method for measuring initial viscosity-reducing water content of cutter head interface |
CN114577512B (en) * | 2022-02-27 | 2023-08-15 | 南京林业大学 | Sampling device and sampling method for measuring initial viscosity-reducing water content of cutter head interface |
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